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CD54HC245 Datasheet(PDF) 1 Page - Texas Instruments

Part No. CD54HC245
Description  High-Speed CMOS Logic Octal-Bus Transceiver, Three-State, Non-Inverting
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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CD54HC245 Datasheet(HTML) 1 Page - Texas Instruments

 
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Data sheet acquired from Harris Semiconductor
SCHS119A
Features
• Buffered Inputs
• Three-State Outputs
• Bus Line Driving Capability
• Typical Propagation Delay (A to B, B to A) 9ns at VCC
= 5V, CL = 15pF, TA = 25
oC
• Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55oC to 125oC
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC
at VCC = 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
VIL= 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH
Pinout
CD54HC245, CD54HCT245
(CERDIP)
CD74HC245, CD74HCT245
(PDIP, SOIC)
TOP VIEW
Description
The
CD54HC245,
CD54HCT245,
and
CD74HC245,
CD74HCT245 are high-speed octal three-state bidirectional
transceivers
intended
for
two-way
asynchronous
communication between data buses. They have high drive
current outputs which enable high-speed operation while
driving large bus capacitances. They provide the low power
consumption of standard CMOS circuits with speeds and
drive capabilities comparable to that of LSTTL circuits.
The
CD54HC245,
CD54HCT245,
CD74HC245
and
CD74HCT245 allow data transmission of the B bus or from
the B bus to the A bus. The logic level at the direction input
(DIR) determines the direction. The output enable input
(OE), when high, puts the I/O ports in the high-impedance
state.
The HC/HCT245 is similar in operation to the HC/HCT640
and the HC/HCT643.
11
12
13
14
15
16
17
18
20
19
10
9
8
7
6
5
4
3
2
1
DIR
A0
A1
A2
A3
A4
A6
A5
A7
GND
VCC
B0
B1
B2
OE
B3
B4
B5
B6
B7
Ordering Information
PART NUMBER
TEMP.
RANGE (oC)
PACKAGE
CD54HC245F3A
-55 to 125
20 Ld CERDIP
CD54HCT245F3A
-55 to 125
20 Ld CERDIP
CD74HC245E
-55 to 125
20 Ld PDIP
CD74HC245M
-55 to 125
20 Ld SOIC
CD74HC245M96
-55 to 125
20 Ld SOIC
CD74HCT245E
-55 to 125
20 Ld PDIP
CD74HCT245M
-55 to 125
20 Ld SOIC
CD74HCT245M96
-55 to 125
20 Ld SOIC
NOTE: When ordering, use the entire part number. The suffix 96
denotes tape and reel.
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
© 2003, Texas Instruments Incorporated
CD54HC245, CD74HC245,
CD54HCT245, CD74HCT245
High-Speed CMOS Logic Octal-Bus Transceiver,
Three-State, Non-Inverting
[ /Title
(CD54
HC245
,
CD54
HCT24
5,
CD74
HC245
,
CD74
HCT24
5)
/Sub-
ject
(High
Speed
November 1997 - Revised May 2003


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